package cn.ggb.eduservice.listener;

import cn.ggb.eduservice.entity.EduSubject;
import cn.ggb.eduservice.entity.excel.SubjectData;
import cn.ggb.eduservice.service.EduSubjectService;
import cn.ggb.servicebase.exceptionhandler.GuliException;
import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;

public class SubjectExcelListener extends AnalysisEventListener<SubjectData> {

    //因为SubjectExcelListener不能交给spring进行管理，需要自己new，不能注入其他对象
    //不能实现数据库操作
    public EduSubjectService subjectService;
    public SubjectExcelListener(){}
    public SubjectExcelListener(EduSubjectService subjectService) {
        this.subjectService= subjectService;
    }

    //读取excel内容，一行一行的读取
    @Override
    public void invoke(SubjectData subjectData, AnalysisContext analysisContext) {
        if(subjectData == null){
            throw new GuliException(200001,"文件数据为空！");
        }
        //一行一行读取，每次读取有两个值，第一个值一级分类，第二个值二级分类
        //判断一级分类是否重复
        EduSubject existOneSubject = this.existOneSubject(subjectService, subjectData.getOneSubjectName());
        if (existOneSubject == null){
            existOneSubject = new EduSubject();
            existOneSubject.setParentId("0");
            existOneSubject.setTitle(subjectData.getOneSubjectName());
            subjectService.save(existOneSubject);
        }

        String pid = existOneSubject.getId();

        //添加二级分类
        //判断二级分类是否重复
        EduSubject existTwoSubject = this.existTwoSubject(subjectService, subjectData.getTwoSubjectName(), pid);
            if (existTwoSubject == null){
                existTwoSubject = new EduSubject();
                existTwoSubject.setParentId(pid);
                existTwoSubject.setTitle(subjectData.getTwoSubjectName());
                subjectService.save(existTwoSubject);
            }
    }

    @Override
    public void doAfterAllAnalysed(AnalysisContext analysisContext) {

    }

    //判断一级分类是否重复，重复不能继续添加
    public EduSubject existOneSubject(EduSubjectService subjectService,String name){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",0);
        EduSubject oneSubject = subjectService.getOne(wrapper);
        return oneSubject;
    }

    //判断二级分类是否重复，重复不能继续添加
    public EduSubject existTwoSubject(EduSubjectService subjectService,String name,String pid){
        QueryWrapper<EduSubject> wrapper = new QueryWrapper<>();
        wrapper.eq("title",name);
        wrapper.eq("parent_id",pid);
        EduSubject twoSubject = subjectService.getOne(wrapper);
        return twoSubject;
    }


}
